The iPhone 4S may not have been the iPhone 5 that tech pundits were looking for, but that single little S – Siri – has turned the phone business on its ear. Voice capabilities, once relegated to the “neat little distraction” category, are now having buckets full of R&D dollars chucked at them as Apple competitors try to develop a Siri-killer. Today Nuance, the maker of Dragon Naturally Speaking, announced that it is buying Vlingo, maker of, well, the Vlingo voice control app, in a blatant bid to knock off Apple’s sweet talker.